Tractor-mounted implement



July 22",v 1944. (A. el EvANs 2,354,250

- Y 'raAcTon-uouNTEn IMPLEHENT 'Filed April 11, 1942 with the; accompanyin'g'v drawing Viin .whi

in; spnnemwh device-endet immensit-eenl- For the present this attaching portion :'se es Anected a pull member Il As viewedfmo means u has a verticany'excendmgbls'z tn.-

as'indicated lat 14,'is a Uffs' lmember 25, theouter` ends of which mentes July 712s, l

working tools and `their to the tram:

or tool-supporting'structnx-e. s Itis an object-of the present invention 'to iifo, Y videfa simple and 1ismael -arlahgenentrota 6D" hitch device. 4wherein the fhitph sion-spring. `fox-'ming -a spart offthat `v-vde in coaxial elinement with the vliriiefof the center oipressure'ofthewrkinfgtoo the lpoint ofV connectionof its with' 'hitch rod. f

l Itis'anotherfobject of-theeinvehtion-gtop hitchevicewithitspartsisoeariansed 'at-i fbe,later'a11y adjusted'to'ihiit sthehitch point mrotnerobielcts and mr y:wetteiunderstand. mg for the invention,refe'rence lmii-y had@ 'the 'following detaileddeScriDtion-takenirg connection nectlnthe'same' to thejtra'ctor, :f Referring Nnow "to the there I, sh l A tractor ortool-supportingjstrnctmesll 1 y forward portion v'Il simportedl onth'ekf gliblle, :1 wheel I2 operable by vil. steering .In

vaccessible to 'an operatbrs'station llfol'L-t'lifc vportion, Il of the tractor., The -rear l includes a depending-axle structure :I i; driven a-traction Vwheel H. v forward portion'lil .0f the i'.l'ai't() attaching portion "adapted vfox-the'ltiiik of Vparts of working implements tothe' tffrdmyni the means for. the attachln'g'jof #the fcus lprlnzV hitch to fthe tractor. 'm8111157 L'Scured 'the attaching Vportion Il y'by 'means o! vv:siste bolts Il isa connectingsmeans'lftofwhic 1x1-Figure 2, it win benotedfthst thisfconn holes-N in thesame tok accommodate-'th ing bolts fil servingto .attachfthe-.l Sme attaching portion `I t jof; the tractor. ,6j to -th'e rearward vertical edgeV 'of this lplate tively connected b'y-m'eans ffconverging and 21 which are in curnconnectedftotheirward #531 laterally shifted position. This shifting of the pull member is made possible by the looseness provided in the openings 48 and u of the bifurcated portion ll of the longitudinally extending portion Il. i

Slidably connected to the'transverse portion Il or rearward end ofthe pull member Itis-a hitch Vrod 49 having a compression spring Il thereon. This hitch rod has on its rearward end, and in rear of the transverse portion 1I, a U- shaped member Il adapted to receive between the same the forward end of a tool beam l2 which* -.placed on the adjusting mechanism 3l as the has on its rearward end a moldboard plow bottom or working-tool Il. This U-shaped member ll is weldingly secured to the'hitch rod. as indicated at 54, and forms apart thereof. Ihis member also serves to prevent forward movement of the hitch rod through the transverse portion I3 of the pull member. Y

Thecompression spring Il has on its respective ends evening pieces I5 and It. The piece I! is flush with the transverse portion 33 and is adapted to react thereagainst. while the piece 5I is retained against sliding movement on the hitch rod I9 by a washer l1 weldingly secured to the forward end of the hitch rod 40, as indicated at 58. This compression spring upon being attached to the pull member 2| is precompressed so that as the plow is being operated under normal plow- ,I ing` conditions, there will be a very slight pull -fof the -hitch rodthrough the transverse pori/)viion 33.

Extendingrbetweena center of pressure point A' somewhereon -the moldboard plow bottom l1 i -,.jjljand` through a hitch-point of the forward end-of the plowbeam 52 with the U-shaped memberil, as indicated by a removable hitch pin It, is a line of draft B indicated by a dot and dash line.

In order to provide a' more emcient cushioning spring device, the hitch rod 4l and its compression spring 50 are arranged to be in coaxial alinement with this line of draft B. The forwardeend of the hitch rod l.. which carries the forward `end'of the compression spring Bl, vis thus supportve'dbyav fore and aft swingable supporting link il having a transverse portion AIl on its lower end adapted to extend through an opening l2 in the forward end ofthe hitch rod 4l and to be retained therein by a cotter pin I3, The upper end of thesupporting link il also has a' transversely extended portion. as indicated at QI, which extends through an opening (I in a rearwardly extending projection 66 of the connecting means 1I. The transverse portion N of the supporting link 60 is retained inthe opening I by a cutter pin 61. By having this supporting link il adapted for fore and aft movement, the hitch rod II is `free to have longitudinal movement.Y It `should also be apparent that this supporting link il by its transverse portion ,il serves as a means for the connecting of the bifurcated'portion I1 of the longitudinally extending portion 32 to the connecting means 20, all'of which serves to simplify the construction of theA hitch device.

In orderthatthe evening piece il of the spring 50 will'be properly alined with the transverse portion 33 of the pull member, the rearward ends Y of the longitudinal portions Il and I2 of the pull member ,2li are ,bent upwardly as indicatedA at U8 in order to place a vertical facet! of the transverse portitn 33 ,in a plane perpendicular to the line of draft B. It should also be apparent that the rearward end of the compression spring,-

rear portions of the longitudinally tions Il and 32 of the pull member 2l.y

By having the rearward end of the pull member 2i supported by the manually adjustable means 34, thehitch device may remain on the tractor even though the plow and its plow beam are disconnectedfromthe same. It isV also better to have the link 31 connectedto Ythe rearward end of the pull rmember 2| for supporting this hitch device than to have the same connected lto the U-shaped member 5I of the hitch rod, Vwherein considerable rearward strain might be compression spring it is.compressed. o

With a hitch device of vthis type the plow bottom 53 need not be provided with a break in its Vconnection with the plow beam I2. The shock ofstriking an obstruction is readily takenrup by the compression spring 50 and breakage' of the plow or otherof its parts is not apt to occur.

Whenit is desired to lift the plow Il.. out of its ground-working positionfthe'same is effected Y `52, as indicated at 13. With plows of this type the .rock-shaft 10 usually includes a second arm laterally spaced and similarly connected to the rearward end of the plow beam l2. Theiplow beam is thus in this manner stabilized withvre- -spect to the tracton 'I'he powerv for lifting or rockingV the rock-shaft 10 is supplied by a uid cylinder device'14 connected to the tractor, as

nindicated at '15 to react thereagainst and to a projection 16 on the arm 1 I. An extension of the fluid-actuated device will lift the arm 1IV upwardly taking with it the plow beam l2 vand its plow bottom 53.v Fluid isrsupplied to the fluidactuated device 14 by a hose connection`11 adaptved to receive iiuid under pressure from a fluid source 18 on the tractor.

It should now be apparent that there has been provideda cushioning spring hitchdevice which is of simple construction Aand wherein the hitch Y :rod .and its compression spring are arranged to be most eifective by having the same in coaxial alinement with theline of draft extending between the center-of pressureof the plow bottom and the connection of its beam with the hitch Yrod. Itshould also be apparent that thisY hitch` device in addition to being simple in construction is also provided with means for giving the same vertical and lateral adjustment in'order to properlyaline the plow bottom in its ground-working position. Y' t i While various changes may bermade in the detail construction, it shall be understood that such rchanges shall be within the spirit and scope ofthe present invention as defined by the appended claims.

What is claimed is:

l. In combination, a tool-supporting structure. a working-toolfstructureadapted to be connected to the tool-supporting structure and including a Y.working tool, a longitudinally extending beam for 5U and its piece 55 are well nested between the 1s the working tool, and a cushioning spring hitch device for connectingrthe tool beam to the toolsupporting structure, said cushioning spring hitch device including a pull member adjustable in length having forward and rearward end portions, aA hitch rod extending through the rearward end oi the pull member, a compression extending por- :ambrato l spring member adapted to react against the' rearward end of the pull member and connected to porting said hitch rod and compression spring in a position substantially in coaxial alinementvv with the line of draft of the working tool through the hitch point of its beam, whereby said pivotal link serves simultaneously .'-to connect the pull member to the tool-supporting structure and to support the hitch rod for free longitudinal movement.

2. In combination, a tool-supporting structure, a working-tool structure adapted to be connected to the tool-supporting structure and including a working tool, a longitudinally extending tool beam for the working tool, acushioning spring hitch device forl connecting the tool beam tothe toolsupporting structure, said cushioning spring hitch device including a pullmember having a pair of laterally spacedk longitudinally extending por` tions adapted toextend generally at one inclination with respect tothe line of draft of the working tool through its hitch point of the beam'with the hitch device, and a closed portion for connecting the rearward ends of the spaced portions to- .5 gether, the rearward'ends of said spaced portions bent upwardly to another'A inclination and intoV alinement-with the lineof draft to thereby dispose the closed portion at right angles therewith,

a hitch rod extending through the closed portion, l0 a compression spring on the hitch rod, nested between the longitudinally extending spaced portions of .thepull member, and adapted to react against the closed portion of the pull member, meansfor supporting the forward endsl of the 15 hitch Vrod and spring for free longitudinal movement and in coaxial alinement with the line of draft, whereby said compression spring will react fiat against the closed portion of the pull-member said last mentioned means comprising adepend-l 20 ing link pivoted adjacent the point of connection of said pull member to sai'dsupport, and means for pivotally connecting the forward end of ksaid hitch rod tothe lower` end of said link.

25" ARTHUR G. EVANS. 

